[Hallicrafters] SX-17 question

[Gerry Steffens]

I have a nice complete SX-17 which is about to become a current project.

I have two manuals, one original and a copy I picked up some time ago.  Both
are identified as 03153817 on the front cover.  The first thing I did was to
restore the original manual.

All text is identical in the two manuals.  However, I noticed that several
resistors and capacitors are of different value between the two.  Further,
the AVC switch is a SPST in one and a DPDT in the other.  Schematics show
the differing switches accordingly.  The copy has a date on the schematic of
9-14-4? (no amount of magnification will make that smudge readable).  The
original book has no date marking and shows the SPST AVC switch.  The copy
has the date and the DPDT switch.

I have not yet completed the schematic comparison.  My guess is that the
copy manual showing the DPDT switch is the later manual.

I don't yet know which version the radio is, as I have not yet grunted it
out.

The question is, should I attempt to reconnect the radio to match the later
manual if the radio is the earlier version?

Is there a documentation of the various changes for the SX-17, S-17 as I
have for the SX-42?  For the 42, I have a large schematic with all updates
through update G or H documented, including dates?

Thanks,

Gerry


Gerald L Steffens P.E.
Oronoco MN
Radio Historian

Collecting & restoring McMurdo Silver, E.H. Scott,
Hallicrafters, National, Heath, Zenith Transoceanic
and any other interesting radios

Collection stands at about 300 radios and several classic Oldsmobiles